Device for attaching belt hooks



Sept. 16, 1941. C; MTTHAEJ 2,255,855

DEVICE lFOR ATTACHING BLT HOOKS CURT ATTHA Sept. 16, 1941.

C. MATTHAEl DEVICE FOR ATTACHING BELT HooKs 5 Sheets-Sheet 2 l /le/fof HTTHA l en? XM2/? Attorneys Filed March '7, 1.939

M ms! WWK n L mm, \R R\|\\ Q m. 1. 1w mi@ ,E E Y L E. f l m @mgm n EN um w\ /mww E Su? www Sept. 16, 1941. c. MATTHAl-:l 2,255,855

DEVICE FOR ATTACHING BELTl HOOKS Filed March 7, 1959 5 sheets-sheet s Atorneys gym Mmmm mf@ Sept 16, 1941. Q MATTHAI 2,255,855

DEVICE FOR ATTACHING BELT HOOKS Filed March 7, 1939 5 sheets-sheet 4 CURT NATTHAH /Attorneys Sept. 16, 1941. c. MATTHAEI 2,255,855

DEVICE FOR ATTACHING BELT HOOKS Filed March 7, 1939 5 Sheets-@5116955 1 /fr//e/var: CURT HATTHAH Patented Sept. 16, 1941 UNITED STATES PATENT OFFICE 2,255,855 DEVICE Fon AT'rAomNG BELT Hooks Curt Matthaei, o-ffenban-on-the-Min, Germany Application March 7, 1939, Serial No. 260,442

In Germany March 9, 1938 11 Claims.

The invention is concerned with a device of this kind in which the end of the belt is firmly pressed against a means holding the belt hooks and in which the belt hooks inserted into a holding comb are attached to the end of the belt by presser jaws adapted to be swung against each other and thereby against the belt. In known devices of this kind the entire width of the end of the belt is clamped between a supporting rail and an upper clamping rail. To obtain a still better forcing of the end of the belt against the means holding the belt hooks laterally acting screws are provided on the frame of the machine by means of which the belt together with the clamping rails is firmly clamped against the holding means.

According to the invention the heavy holdingand pressing means are 'dispensed with which are of a relatively complicated construction and therefore render` difficult the operation of the entire device. The invention substantially consists therein that spring-pressed means, i. e. means for gripping the belt, are mounted on the presser jaws themselves so that if the jaws are swung about their pivots during closing, the spring-pressed means carried by them perform a path in the direction towards the holding comb and thereby force the gripped belt towards the holding comb. Slides holding the lateral edges of the belt are adjustably mounted upon the-supporting rail of the belt, said slidesY carry resilient 35 bolts engaging the lateral edges of the belt and holding the end of the belt in the correct position upon the supporting rail. To warrant a uniform application of the belt hooks over the entire width of the belt in such a manner as to relieve the front edge of the belt of stresses tend-` ing to lift it off the holding comb, two oppositely arranged rails forming a trough are provided according to the invention at the holding comb. In this trough the belt hooks may be centered upon a holding pin inserted into the holding comb. The space in the holding combreceiving the holding pin is, moreover, so formed that the curved vortex of the belt hooks may lift on! the holding pin during the attaching operation and that at the end of this operation the vortex of the hooks bears against the inner surface of the holding comb, so that during the application ofA the' belt'hooks the latter cannot exert a harmful action upon the end of the belt;

The invention further relates to a devicefor attaching belt hooks provided with a lever drive in ,which the belt hooks inserted into the holding comb are in a step-like manner attached to the j; belt over the entire width of the latter by means of the presser jaws;

The known devices. ofthis kind were so constructed that a pair of 'toggle-levers was actuated by means of a rotatable spindle capable of straightening or opening'said toggle, or a cam member also capable of straightening the toggle when operated by a ratchet and pawl drive and a handle. The handle or hand lever was moved parallel to the edge of the belt to be provided with belt hooks. Devices for attaching belt hooks are, moreover, known inwhich the step-like attaching of the belt hooks is effected by a pincer action by means of two handles vertically moved against each other..` When employing such devices for attaching 'belt hooks underground where often a slight height of space only is available, the operation of such device is rendered difcult by the fact that the physical effort required4 for reciprocating the hand'lever or for `fclosing the levers acting like a pair of pincers can be utilized rather unfavorably only.

The object lof the invention is to so construct such devices for attaching belt hooks that in a very limited space,v particularly in a space of very slight height,a simple and safe operation is possible, fully andleasily utilizing the physical effort so that relatively slight physical eiorts are suiiicient to produce a very .powerful pressure of the jaws upon the belt hooks. According to the invention this object is 0b tained bylinking a second pair' of toggle-levers, operating in the plane of the belt, to the connecting pin of the pair of toggle-levers operating in a plane vertically to that of the belt. Each ofthe shanks swingably mounted about a fixed shaft carries a handle. Preferably the second pair of toggle-levers is swingably mounted about a common fixedA shaft or bolt arranged in the operating plane of the first pair of toggle-levers. In a manner known both pairs of toggle-levers are journalled in a carriage which may be horizontally displaced by a lateral feeding device. One of the ,guidesl of the carriage may, for this purpose, be'formed as a rack with which cooperates a pinion mounted' on the carriage, whereas 'the other guide of the carriage is formed as a stop for a locking device, for instance aY q 5.5? 'In'the accompanying drawings, a device for 1f the width ef the beit exceeds that ef the presser jaws as this is generally rthe case, the belt hooks are attached in a step-like manner. At the beginning of the attaching operation the carriage v5 is shifted to the one end of the belt and is then fed by the gearing 3, 29, 30 along they entire edge of thebelt as often as may be required shanks of the belt hooks, the operation of attaching the belt hooks begins. During this attaching operation the spring-pressed bolts 33, 34 tend to always force the end of the belt'B more firmly against the holding comb 4D. Simultaneously the points of the belt hooks lare attached to the end of the belt pressed against the holding comb and, as indicated in Fig. 6, the points of the hooks are deformed in the manner of rivets,

provided they are of sufficient length withrre-A gard to the thickness of the belt.

During the attaching operation a further es sential feature results which is due to theparticular construction of the holding combv 40. Before the belt hooks are compressed the vortex of the latter bears with the inner side against the holding pin 4|, whereas the outer edges of the shanks of the belt hooks bearagainst the angularv rails 42, 43. 'I'he vertical projection from the vortex of the belt hook to the ends of the p oints of the hookv for the shorter shank of the beltvhook has the value a and for the longer shank the value b (Fig. 4). If now the belt h ooks are gradually pressed into to Ythe belt, their vortex is lifted off the holding pin 4 and finally the belt hooks reach the position shown in Fig. 6 in which their vortex bears against the front edge of the extension As soon as the` presser jaws IB, I1 come into contact with the or projection 39. The vertical projection from the vortex ofthe belt hook tothe points then 'for the shorter shank has the value a andfor the The value a'` being greater than the value aY and the value b' longer shank the value b' (Fig. 6l

also being greater than the value b.

In the known devices this difference betweenA the values a and a and b and b respectively has been one reason for the fact that the end ofthe belt always was pressed off Athe holding comb. Due to the fact'that with YtheuseY of the known devices the vortex of the belt hooks .could not be lifted off the holding pin during theattaching operation, the hook points entering the belt acted in the sense of increasing the values a and b to the values a and b respectively,therebyrgiving risev to the formation of a pressure component which tended to force the belt away from theholding comb 40. I a

By arranging the spring-pressed bolts'33, 34 -on the presser'jaws I6, I1 and bythespeciallzforma-f tion of the holding comb 40 according to the invention the drawbacks occurring Vhitherto during' the attaching operation are reliablyreniovedwith the use of very simple means.

The invention has the further advantage that' the hithertorequired heavy U- orT-shaped holdingand clamping-rails for the endof the belt. are completely dispensed with. Hereby' the modef of operation of the device and its'handling arei simplified.` In contradistnction to the hitherto usedinode of operation, it isvwith the new device required only to insert the lateral edges of belt into the slides 35, 36.` During the operation of attaching the belt hooks, the ybelt is then drawn in and held-by 'the spring-pressed bolts33, 34. The pressure ofthe spring-loaded bolts 3l and 38 carried by the slides' 35v and 36 respectively is so calculated that the belt is reliably held by means of the two springpressed bolts, however, the 'zone of the two lateral edges of the belt may nevertheless be drawn towards the holding comb40.

What I claim is: l

1. A device for attaching beltvhooks to belts, comprising means for-holding 'said belt hooks including a holding piri adapted vto cooperate with said means for holdingsaid belt hooks, means forlholding the end of a belt, a pair of presser jaws mounted on pivots arranged above and below the plane of said belt respectively, means for moving said presser jaws in opposite directions -towards the 'b'elt for folding said belt hooks against the upper'and lower surfaces of the belt, and spring-pressed means arranged on each presser jaw,Y the larrangement being such that during movement of the presser jaws towards each other and before said jaws come into contact with said, belt hooks said spring-pressed means swing around the pivots o'f the corresponding presser jaws and in. their pivotal movement move inwardly relative to the holding means to press the end of the belt against said holding means.

2. A device for attaching belt hooks to belts, comprising means for holding said belt hooks including a holding'pin adapted to cooperate with said means for holding said belt hooks, means for holding the end of a belt, a pair of presser jaws mounted on pivots arranged above and below the plane of said belt respectively, means for moving said presser Ajaws in opposite'directions towards the belt fori foldingfsaid belt hooks -against the upper and lower surfaces of the belt, and a springpressed bolt arranged on each presser'jaw, the arrangement being such that during movement of the' presserjaws towards each other and before said jaws come into contact-with said belt hooks said spring-pressed bolts swing around' the pivots ofthe corresponding presserV jaws and in theirpivotal movement move inwardly relative to the holding means to press the end of the belt against said holdingn means.

3. A device for attaching belt hooks'to belts,

comprising' means for holding said belt hooks including a holding pin adapted to cooperate with saidI meansr for `holding said belt hooks, means for holding' the end of a` belt, a pair of presser jaws mounted on pivots arranged above and below the plane of said'belt respectively, means for moving said presser jaws in opposite directions towards the belt for folding said belt hooks against the upper and lower surfaces of the belt, a'spririg-pressedbolt provided with a roughenedoperative end arranged on each presser jaw, the "arrangement being such that during movement ofthe presser jaws towards each other and before said jaws come into contact with said belt hooks said spring-pressed bolts swing around the pivots of the corresponding presser jaws and in their pivotal movement move inwardly relative to the holding lmeans'to press theend of the belt against saidlholdi'ng means.

4i A'y device for' attaching belt hooks to belts, comprising a frame, a belt-supporting rod on 'said frame, slidesv adjustably arranged on said'k beltsupporting rod', a' spring-controlledwbolt in each holding means to press the end means' for of Saidslides forholdiuathef 'belt near `its" sides;v

means-on saidffrome for-holding. said belt hooksV including a holding pin adapted to cooperate wth saidl rneansfor holding; said :belt hooks, means for holding the end of: a belt, a pairof presser jaws mounted on pivots arranged above and below the plane iof said belt.respeotivelysmeans Yfor mov--A operativeend arrangedon each presser jaw, the

arrangement being such that during movement of theipresser 'japws.;lto wards` each.V other and before.` said jaws 'come into eontaetwith said beltghookssaidv spring fpressed bolts swing around the pivot of. the. eorrespondingpresser jaws and in their pivotal; movement move inwardly relative to. -the of the belt against:

said holding means. Y 1 j z 5. Adevieerfor attaching beltv hooks tolbelts, comprisingfmeans for holding saldbelthooks inf.` cluding va holding pin adaptedi to cooperatey witlrV said means `for holding said belt hooks, saidlnold.-`

tex. oi saidbeltlrooks may move while said hooks. are'y fol-ded against the belt, means for holding thev eudora-belt; a pair of presserjaws. mountedgon.

pivotsY arranged4 above and below the planefoi';

presser: jaws in' opposite Ydirectionstowards. the belt for folding Ysaid belt hooks against the up.

` per and lower surfaces'ofjthe beit,v anda springpre'ssed'bolt provided Awith a roughened operativev end arranged on each .presser jaw, the' arrangeasesora-:.-

presser laws monntedon' pivots .arranged aboveandfbelow thefplane -oiv said belt respectively, means for movngsaid presser jaws in-opposite directions towards. the belt Vfor folding saidrbelt hooks against the .upper and lower surfaces Vof the belt, `and a spring-pressed bolt provided with: a roughened operative end arranged on each press-` er jaw, the arrangement 'being such that duringy movement of thepresser jaws towards each other loi; and before said jaws comei-nto contact with said belthooks.jsaidspringpressed bolts swing around A; tn epivots of,` the corresponding: presser 'j aws .and in their pivotal movementmove-inwardly relativev to the holding Ymera-ns. to lpressythe Yend ofA thebeltagainstsaid holdingmeans.- f f said means for holding said belt hooks, means.

. for holding the' end of a: belt, a pair of presser jaws', a vertical system of toggle-levers and links` for mowing Said presser jaws towards the belt .in opposite directions for foldingr said belthooks u against the-upperrand*lowersurfaces of the beltijf. .i ing means'. presenting a'space in. which the vor-25; a horizontal system of toggle-levers and links,

meansoperatively connecting the two systemsfot toggle-levers and links, manual means for operatingv the horizontals vstem of toggle-levers vand links, and a spring-pressed bolt provided with 1a.

i Y said belt" r'espectivelm means vfor moving said; 30;; ronghenedOperative end-'arranged on each presser' jaw, the arrangement. being Asuch that' durother and beforesaidjaws come into; contact ,with

35i around the; pivots oitheeorresponding presser-rY ment being :such th'atvduring'. movementV of: the Y presser jaws; towards each other and before Said jaws come into contact with said belt hooksfsaid:

springepressed bolts swing around: the' pivots' of: the corresponding'lpresser jaws and'in their pivotal movement'mov'e inwardlyV reiativeto they holding means. to press the end', of the belt againstl said holding means'.- l Y 6; nfdevice for attaching bitnooks. to belts@ ing the vortex of said belt'phook's, an abutment at? one' endl o'i" the' space'for arresting thevortex ofthe belt vhooksv'vhenl the. foiding operation has said belthooks sai-dspring-pressed bolts` swing jaws and in Ytheir pivotalmovement movein- Wardlyrelative to the holding meansto press` the end .0i the beltv against said holding means.l

i9. Adex/iceI forattaching belthooks to belts',l comprising' means for holding said-belt Yhooks including a holding pin adaptedvto-*cooperate withV i said'means' for holding; saidf belt fhooks; means for holding-the. Iend of-afbelta Ypia-ir offpressery jaws-, a verticalfsystemoitoggle-levers and linie;v

for moving said' presser jaws Ltowardsthebelt inf opposite i directions for 'foldinjg'said belt. hooks against-theV upper and lower snrfacesoithe belti aY iixedy pivotpinl` apai-r of' horizontaltoggleflevers mounted to swing about said pivotv pint, a handle Eik. 4for manual operation on each horizontal toggle-A been completed, means for holding the'. erldofia-4v l belt, a pair of' presser jaws mounted ori-pivots ar- .rangedV above'andbelowzthe" plane Yof said beit` ranged-p on :each `presser `javnrthe arrangement; y

being 'suchyth'at during movement 'or the presser jaws towards eachother' and beforersaid jaws comek into Contact' 'withjsaid .belt hoolrs said-1 movement move' inwardly relative to the holding. means to pr'essrthe end of the beltfagainstfsaid; holdingmeans,.I 1

f v7.2 AA .device for att againstsaid holdingmeans.-

Y I spring-pressed boltsswing aroundthe pivot ofthe Y belt hqoks, to. bensrV corresponding presser jaws` and lin their pivotalV aching 'beltrhooks' to belts; Y comprising means for holding said beltshooksA ine-` y Y j 'cluding'a yholding pinadapted to. cooperate*witlrv 'ioarranged above and belowtlieplaneoi saidbelt; 3 said means for holding said' belt hooks; members Vprovided''atthe upperia'nd the iawersideyof the H holding 'meansY .which converge away from the-, Y A belt'f'for-Vcenteringsaid belt: hooks.,;`Y

h'olding the. endofa beltpa-fpailpf; provided-.withv-a V`rongliened .ope a lever, a link connecting 'eaehi horizontal toggle-f j leverto: said verticalsystem '.oi toggle-levers and linles,. and a spring-pressed bolt provided .with a; Y

ronghened: operative end arrangedon ,each pressV belt hooks. saidspring-pressed bolts swingaround thev pivots or the eorresponding-presser jaws. and, Y y 60? initheir pivotal movement move inwardly relative.

to ther holdingV means.` to press, the end or the belt;

10.; A. device f or attaching comprising a frame, means provided on said frame for lfioldingl said .belt hoolfzsv` including a Yholding pinadaptedtoeooperate with. said. Y

for'fholding .saidbelthooksg Vrneansj or Al'loldingtlie Y K ena-ofenda a` vcefriese:roomtedte Slide Oli ISeidframe; a pair of presser..A :j aws: mounted; V.on pivotsv respectivelys-means :forjmoving said presser .jaws

inY opposite directions towards thefb'eltior fold-. ing said'- belt:hooksagainst-Athe;upper: and lx'nwer.V

y 8. A-device-for attaching belt. hooks tofbelts; 'i 1 comprising means for holding said beltA hooks including aholding pin adaptedto -c'ooperatewith ranged on each presser jaw, the arrangement being such that during movement of the presser jaws towards each other and before said jaws come into loontact with said belt hooks said spring-pressed :bolts swing around the pivots of the corresponding presser jaws and in their pivotal movement move inwardly relative to the holding means to press the end of the belt against said holding means.

11. A device for attaching belt hooks to belts, comprising a frame, means provided on said frame for holding said belt hooks including a holding pin adapted to cooperate with said means for holding said belt hooks, means for holding the end of a belt, a carriage mounted to slide on said frame, a pair of presser jaws mounted on pivots arranged above and below the plane of said belt respectively, means for moving said presser jaws in opposite directions towards the belt for folding said belt hooks against the upper and lower surfaces of the belt, and a spring-pressed bolt provided with a roughened operative end arranged on each presser jaw, the arrangement being such that during movement of the presser jaws towards each other and before said jaws come into Contact with .said belt hooks said spring-pressed bolts swing around the pivots of the corresponding presser jaws and in their pivotal movement move inwardly relative to the holding means to press the end of the belt against said holding means, and a spring-loaded bolt for arresting said carriage in denite positions on said frame.

CURT MAT'I'HAEI. y 

